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Inferior anal nerves

FieldValue
NameInferior anal nerves
Latinnervi anales inferiores,
nervi rectales inferiores,
nervus haemorrhoidalis inferior
ImageGray542.png
CaptionThe superficial branches of the internal pudendal artery. (Inferior anal nerves visible but not labeled.)
Image2Pudendal nerve.svg
Caption2Pudendal nerve, its course through the lesser sciatic foramen, and branches, including inferior anal at bottom right.
InnervatesSphincter ani externus and sensory around the anus
BranchFromPudendal nerve (usually)
sacral plexus (occasionally)

nervi rectales inferiores, nervus haemorrhoidalis inferior sacral plexus (occasionally) The inferior rectal nerves (inferior anal nerves, inferior hemorrhoidal nerve) usually branch from the pudendal nerve but occasionally arises directly from the sacral plexus; they cross the ischiorectal fossa along with the inferior rectal artery and veins, toward the anal canal and the lower end of the rectum, and is distributed to the sphincter ani externus (external anal sphincter, EAS) and to the integument (skin) around the anus.

Branches of this nerve communicate with the perineal branch of the posterior femoral cutaneous and with the posterior scrotal nerves at the forepart of the perineum.

Supplies

Cutaneous innervation below the pectinate line and external anal sphincter.

Additional images

File:Gray405.png|The perineum. The integument and superficial layer of superficial fascia reflected. File:Gray837.png|Sacral plexus of the right side. (Hemorrhoidal branch of pudic labeled at bottom right.)

References

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

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